SUBJECT INDEX 



213 



Orderliness 186 et seq. 

 Organ-field 148, 149, 179 



— primordia 2, 5, 6, 79, 95, 

 99. 100, 122, 128 et seq., 151 



et seq. 

 Organisation 128 et seq., 164, 

 166, 167, 168, 169, 171, 193 



— centre 113 et seq., 131, 193 



— field 121 et seq., 137, 142, 

 145, 147, 148, 149, 151, 167 

 et seq., 179, 180, 181 



Organiser 6, 112 et seq., 167, 



168, 170, 181, 193 

 Organisine 117, 125 

 Organogenesis 128 et seq., 193 

 Orienting rotation 41 

 Osmosis 13, 186, 187 

 Osmotic pressure 20 

 Ovary 7, 9, 11, 40, 193 

 Oxidases 51, 60, 85, 193 

 Oxidation 65, 118 

 Oxygen 159, 164, 171 



Paracentrotus 30, 76, 77, 78, 83 

 Parthenogenesis, artificial 18 



et seq., 66 

 Parthenogenetic merogony 66 

 Patrocline hybrids 77, 193 

 Penetration of sperm 12, 14 et 



seq., 22, 23, 41 

 Peristome 167, 193 

 Perivitelline cavity 12, 13, 193 



— fluid 19, 41 



Permeability 5, 10, 21, 44, 118 

 Peroxidases 60, 61, 193 



pH of cytoplasm 43, 44, 63 

 Pharynx 164 et seq., 194 



— sheath 166 

 Phosphatase, alkaline 107 

 Phosphate bonds 65 

 Phosphatids 33, 34 

 Phosphorylation 65 

 Pigment 87, 89, 91 



— cells 80, 81, 85, 86. 87 



— epithelium 129, 131 

 Pigmentation 89, 140, 173, 176 

 ~, Amphibia 80, 84, 85, 86 



— , eggs 40, 41 



Planaria 161, 163, 164, 166, 



167, 170 

 Planarians, regeneration 160 



et seq., 170 et seq., 173 

 Plasmagenes 86, 194 

 Platycnemis 69, 70 

 Pleurodeles 116 

 Pluteus 29, 30, 44, 45, 76 et 



seq., 83 et seq., 95, 194 

 Polar bodies 8 et seq., 39, 48, 



55, 99, 194 



— lobe 55 et seq. 

 Polarisation microscope 33 

 Polarity 4, 39 et seq., 63 91, 



92, 134, 137, 140, 143, 'l60, 

 161, 182, 194 

 Pole, animal 10, 39 et seq., 

 50 et seq., 189 



— -plasms 50 et seq., 60 

 — , vegetative 39 et seq., 50 



et seq., 69, 195 

 Polycelis 160, 165 

 Polychaetes 10, 14, 31, 162 

 Polypeptides 33, 34 

 Polyploids 67, 194 

 Polyps 163, 167, 168, 169, 171, 



172 

 Polysaccharides 11, 14 

 Polyspermy 14 et seq., 17, 194 

 Posttrochal region 57 

 Potassium 10, 44 

 Potency 6, 44, 45, 54, 59, 60, 



62, 63, 92, 107, 131, 132, 137, 



140, 142, 144, 145, 147, 148, 



149, 151, 194 

 Potencies, differentiation 107 



et seq. 

 — , histogenetic 107 et seq. 

 — , topogenetic 101 et seq., Ill 

 Potential, electric 169 

 Predetermination 136, 139, 



147, 194 

 Preformation 3, 27, 34, 194 

 Pretrochal region 57 

 Proliferation 139, 151, 170, 



173, 176 

 Pronucleus 9, 15 et seq., 22 et 



seq., 194 



